US2972731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Echo distance measuring systems
Assignee: Raytheon Co
•
Filing: 1949-09-13
•
Granted: 1961-02-21
•
Expires: 1969-09-13
Abstract
No abstract record available.
Inventors
- 👤 John N Beebe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:57
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/87; Y; Y10; Y10S; Y10S367/00; Y10S367/903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1816579A
Cited
US2036187A
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US2039405A
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US2144215A
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US2527547A
Cited
US2418156A
Cited
US2467400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-21 | 1964-08-22 | 1965-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-21 | 1968-08-22 | 1969-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-21 | 1972-08-22 | 1973-02-21 | $7700.00 | Window Closed / Lapsed |